Newsweek reports that two wool textile fragments discovered in Israel’s Cave of Skulls in 2016 had been dyed bright red with dye made from Kermes vermilio, a species of scale insect. The fabric has been dated to 3,800 years ago, making it the oldest known use of scale insects for dyeing textiles.“Identifying the dye in the ancient textile was achieved using High-Performance Liquid Chromatography (HPLC)—a device commonly employed in biology and chemistry laboratories to separate and identify substances in minute quantities,” said Na’ama Sukenik of the Israel Antiquities Authority.A large quantity of the insects would be needed to produce a...